Canadian Dam Association Bulletin - Summer 2016 - 21

UPSTREAM COFFERDAM CORE IMPERVIOUS BLANKET FILTER FLOW NET Figure 2: Flow Net of Dam with Impervious Blanket (USACE 1938) TABLE 1: SUMMARY OF SEEPAGE ANALYSES Flow, Q m3/s/m Hydraulic Gradient (at filter), i Upstream impervious blanket 12.5 0.20 Sheet-pile cut-off wall (1/2 depth) 12.2 0.05 Just an impervious core 28.9 0.36 Design Alternative The upstream impervious blanket alternative was selected for the dam. This alternative is presented on Figure 2. 3.5 Control of Internal Erosion The potential for, and possible consequences of, internal erosion due to seepage were recognized. In a report 100 Perecent Passing by Mass (%) coarse-grained loose sands could not be preserved so the specimens were reconstituted and K measured. The Kv of specimens of compact sand and gravel was measured in the sampling tubes. The fallinghead device was used for all soil types except for coarse, uniform sand and gravel. The constant-head device was used on coarse, uniform sand and gravel. Based on the findings of the study, the following assumptions were made with respect to seepage analysis: 1. The foundation soils are anisotropic with a K h/Kv ratio of 4. 2. The core and the upstream blanket are impervious. 3. The value of K h for the dam (except the core) and the foundation soils above el. 85.3 m and below el. 79.2 m is 1.0x10-5 cm/s. 4. The value of Kv for the foundation soils between el. 85.3 m and 79.2 m is 4.0x10-6 cm/s. The hydraulic regimes of the design alternatives were evaluated using flow nets (USACE 1938). The results are summarized in Table 1. 90 80 BASE LAYERS OF FINE FOUNDATION MATERIALS 70 FINE FILTER 60 50 40 COARSE FILTER 30 20 10 0 0.001 0.01 0.1 1 10 Diameter (mm) Figure 3: Grain size distribution curves of the filters and foundation materials (from Brown 1940) Canadian Dam Association * Summer 2016 21

Table of Contents for the Digital Edition of Canadian Dam Association Bulletin - Summer 2016

BOARD OF DIRECTORS
NEW WEBSITE LEADS CDA RECENT NON-TECHNICAL INNOVATIONS
ICOLD NEWS
THE FRANKLIN FALLS DAM: DESIGN, CONSTRUCTION AND RESPONSE TO THE 1982 GAZA (NEW HAMPSHIRE) EARTHQUAKE
CDA CONFERENCE 2016
CDA OFFERS ASSISTANCE AFTER BRAZIL DAM DISASTER
DAM SAFETY REVIEWS TECHNICAL BULLETIN
TIME TO RENEW YOUR MEMBERSHIP
NOTICE OF AGM
BUYERS’ GUIDE AND TRADE LIST
CALL FOR PAPERS
Canadian Dam Association Bulletin - Summer 2016 - cover1
Canadian Dam Association Bulletin - Summer 2016 - cover2
Canadian Dam Association Bulletin - Summer 2016 - 3
Canadian Dam Association Bulletin - Summer 2016 - 4
Canadian Dam Association Bulletin - Summer 2016 - 5
Canadian Dam Association Bulletin - Summer 2016 - 6
Canadian Dam Association Bulletin - Summer 2016 - BOARD OF DIRECTORS
Canadian Dam Association Bulletin - Summer 2016 - 8
Canadian Dam Association Bulletin - Summer 2016 - NEW WEBSITE LEADS CDA RECENT NON-TECHNICAL INNOVATIONS
Canadian Dam Association Bulletin - Summer 2016 - 10
Canadian Dam Association Bulletin - Summer 2016 - 11
Canadian Dam Association Bulletin - Summer 2016 - ICOLD NEWS
Canadian Dam Association Bulletin - Summer 2016 - 13
Canadian Dam Association Bulletin - Summer 2016 - THE FRANKLIN FALLS DAM: DESIGN, CONSTRUCTION AND RESPONSE TO THE 1982 GAZA (NEW HAMPSHIRE) EARTHQUAKE
Canadian Dam Association Bulletin - Summer 2016 - 15
Canadian Dam Association Bulletin - Summer 2016 - 16
Canadian Dam Association Bulletin - Summer 2016 - 17
Canadian Dam Association Bulletin - Summer 2016 - 18
Canadian Dam Association Bulletin - Summer 2016 - 19
Canadian Dam Association Bulletin - Summer 2016 - 20
Canadian Dam Association Bulletin - Summer 2016 - 21
Canadian Dam Association Bulletin - Summer 2016 - 22
Canadian Dam Association Bulletin - Summer 2016 - 23
Canadian Dam Association Bulletin - Summer 2016 - 24
Canadian Dam Association Bulletin - Summer 2016 - 25
Canadian Dam Association Bulletin - Summer 2016 - 26
Canadian Dam Association Bulletin - Summer 2016 - 27
Canadian Dam Association Bulletin - Summer 2016 - 28
Canadian Dam Association Bulletin - Summer 2016 - 29
Canadian Dam Association Bulletin - Summer 2016 - 30
Canadian Dam Association Bulletin - Summer 2016 - 31
Canadian Dam Association Bulletin - Summer 2016 - 32
Canadian Dam Association Bulletin - Summer 2016 - 33
Canadian Dam Association Bulletin - Summer 2016 - CDA CONFERENCE 2016
Canadian Dam Association Bulletin - Summer 2016 - 35
Canadian Dam Association Bulletin - Summer 2016 - 36
Canadian Dam Association Bulletin - Summer 2016 - 37
Canadian Dam Association Bulletin - Summer 2016 - 38
Canadian Dam Association Bulletin - Summer 2016 - 39
Canadian Dam Association Bulletin - Summer 2016 - 40
Canadian Dam Association Bulletin - Summer 2016 - 41
Canadian Dam Association Bulletin - Summer 2016 - 42
Canadian Dam Association Bulletin - Summer 2016 - 43
Canadian Dam Association Bulletin - Summer 2016 - 44
Canadian Dam Association Bulletin - Summer 2016 - 45
Canadian Dam Association Bulletin - Summer 2016 - 46
Canadian Dam Association Bulletin - Summer 2016 - CDA OFFERS ASSISTANCE AFTER BRAZIL DAM DISASTER
Canadian Dam Association Bulletin - Summer 2016 - 48
Canadian Dam Association Bulletin - Summer 2016 - 49
Canadian Dam Association Bulletin - Summer 2016 - 50
Canadian Dam Association Bulletin - Summer 2016 - DAM SAFETY REVIEWS TECHNICAL BULLETIN
Canadian Dam Association Bulletin - Summer 2016 - 52
Canadian Dam Association Bulletin - Summer 2016 - NOTICE OF AGM
Canadian Dam Association Bulletin - Summer 2016 - BUYERS’ GUIDE AND TRADE LIST
Canadian Dam Association Bulletin - Summer 2016 - 55
Canadian Dam Association Bulletin - Summer 2016 - CALL FOR PAPERS
Canadian Dam Association Bulletin - Summer 2016 - 57
Canadian Dam Association Bulletin - Summer 2016 - 58
Canadian Dam Association Bulletin - Summer 2016 - cover3
Canadian Dam Association Bulletin - Summer 2016 - cover4
Canadian Dam Association Bulletin - Summer 2016 - outsert1
Canadian Dam Association Bulletin - Summer 2016 - outsert2
Canadian Dam Association Bulletin - Summer 2016 - outsert3
Canadian Dam Association Bulletin - Summer 2016 - outsert4
Canadian Dam Association Bulletin - Summer 2016 - outsert5
Canadian Dam Association Bulletin - Summer 2016 - outsert6
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